A.C. Grayling, author of a recent biography of René Descartes, explores Descartes' Cogito argument, the pivotal argument of the Meditations, in conversation with Nigel Warburton in this episode of Philosophy Bites.

Is belief in the existence of a God or gods the equivalent of believing that there are fairies at the bottom of the garden? Or can it be defended on the basis of reason or evidence? In this interview for Philosophy Bites Anthony Grayling gives a philosophical defence of atheism and explains why he believes it to be a well-grounded and ultimately life-affirming position to hold.